The specialist for fastening technology

 
 

Topduo - Roofing screws

TopDuo: Double threaded screw

For fastening over rafter insulation with insulation

thicknesses up to 300 mm.

Over rafter insulation with:

left site: non-pressure-resistant insulation

right site: pressure-resistant insulation

 

 
 

Topduo


Roofing screw

For fastening over rafter insulation with insulation thicknesses up to 300 mm. Can also be used for many other applications in wood construction because of the high extraction resistance.

With the Topduo double threaded screw over rafter insulation can be fixed firmly in place with pressure-resistant and non-pressure-resistant insulating materials.

Screw layout for over rafter insulation with non-pressure-resistant insulating materials Compressive strength at 10% compression σ10%

eg: mineral fibre insulating materials*

* The compressive strength σ10% is to be taken from the product data sheet issued by the insulating material manufacturer.

 

The high extraction resistance in both connection woods naturally makes Topduo interesting for many other applications in wood construction as well.

Screw layout for over rafter insulation with pressure-resistant insulating materials Compressive strength at 10% compression σ10% ≥ 50 kPa

eg: PUR and wood fibre insulating materials*

* The compressive strength σ10% ≥ 50 kPa may not be reached for individual products in the above-mentioned group and is to be taken in any case from the product data sheet issued by the insulating material manufacturer.

Topduo